Carbureter.



F. A. & W. Y. CHAPIN. GARBURETEP.. APPLICATION FILED 1,111.7, 1911.

WJTNESSES- 1 Fig 2/ Patented Feb. 20, 1912.-

Sms

FRANCIS A. CHAPIN, .0F INDIANAPOLIS, AND WILLIAM Y. CHAPIN, OF MUNCIE,

INDIANA, ASSIGNOES T0 THE CHAPIN MANUFACTURING COMPANY, OF INDIAN- APOLIS, INDIANA, A CORPORATION.

CABBURETEB.

To all whom it may concern:

Be it known that we, FRANCIS A. CHAPIN and WILLIAM Y. CHAPIN, of Indianapolis, county of Marion, and Muncie, county of Delaware, respectively, State of Indiana, have invented a certain useful Carbureter; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings.

The object of our invention is to provide improvements in carbureters so as to form a better admixture of air and hydro-carbon to form gas.

The features of the invention will be understood from the accompanying drawings and the following description and claims:

.In the drawings Figure 1 is a side elevation of the carbureter. Fig. 2 is a plan view showing the device in idle position. Fig. 3 is a plan view showing the position of parts at high speed. Fig. 4 is a central vertical section through the upper part, the lower part being broken away and the parts being shown in idle position. Fig.

5 is the same with the parts in position for high speed. Fig. 6 is the top part of what is shown in Fig. 1 with part of the carbureter in section and showing the auxiliary air valve closed. Fig. 7 'is a rear view of the means for manually closing the auxiliary air valve. Fig. 8 is a section on the line 8-8 of Fig. 5.

The device consists chiefly of a float chamber 10 in the shape of an ordinary bowl and a carbureting chamber 11 which is substantially U-shaped, the upper end of one side having an air 'intake 12 and the upper end of the other side having a mixture outlet 13`which is connected with the engine. The two parts are removably secured or screwed together.

A fuel nozzle 14 extends from the oat chamber into the central part of the bottom of the carbureting chamber under a point intermediate the air intake 12 and the mixture outlet 13. The fuel supply is controlled by a needle valve 15 which is secured into an extension 16 midway between the air intake 12 and the mixture outlet 13. Hence when the needle valve is screwed downward it tends to close the fuel nozzle Specification of Letters Patent.

' Application filed January 7, 1911. Serial No. 601,414.

Patented Feb. 20, 1912.

and when the needle valve is screwed up ward it tends to open the fuel nozzle. The needle valve is actuated by a crank -17 which is secured to the same above the extension 16 and extends horizontally and is pivoted at its outer end to an angular piece 18 which in turn is pivoted to a connect-ing bar 19 which is pivoted to a crank 20 on the shaft 21 of a throttle valve 22 in the mixture outlet opening. On the same end of said shaft 21 a crank 23 is secured. The action of the throttle lever is limited by a stop lug 24E-extending laterally from the mixture outlet portion 13 of the device and as the crank 20 extends beyond the shaft 21 and carries a stop screw 25 that engages on said stop lug, the throttle is moved to aclosing position. When the throttle is moved to an open position, said lug stops the movement thereof by engaging the lower end of the crank 20 which is secured to the connecting bar 19. On the other side of the outlet portion 13 of the carbureting chamber the shaft 21 has a crank 2G which is pivoted to .i connectingbar 27 which runs to an arm 28 which is loosely secured on a shaft 29 which extends through the air intake 12 adjacent one side thereof, see Fig. 4. This shaft 29 carries an air valve 30 which is secured to said Shaft at one edge thereof, as shown in Fig. Il. The air intake 12 is not circular in cross section, but rather semi-circular, as shown in Figs. 2, 3 and 8. ln other words, its inner surface is straight, both vertically and horizontally and it is substantially in alinement with a. stop 31 in the lower part ofthe carbureting chamber against which the llower end of the valve 30 strikes when the valve is moved to a closed position, as shown in Fig.`4. Hence the air-intake'is almost.

vertical and semi-circular in cross section and the bottom 32 is flat. The only object of the peculiarity of the form of the air intake is to enable the air valve to be mounted and operated at one edge thereof and by movement of the other end of the valve to entirely open or entirely close the passageway and the fulcrum o the valve is placed above the bottom of the passageway on a higher level with the fuel nozzle so that the air valve when open, will deflect and direct all of the incoming air so as to cause it to sweep directly over the nozzle ,and over the Aau bottom ot' the carbureting chamber.. 'lhis greatly promotes the mingling ont the air and the hydro-carbon to produce a satisitactory mixture. 'lhe smaller the quantity oit' air admitted by the valve, the more completelyit is directed against the bottom of the carburstingq chamber and against and over the nozzle.

rlhe crank 28 moves the shaft 29 through the intervention ot a spring 128 which is secured to the shaft and coils about it With the tree end pressing against the outer end ot the crank 28. llhis provides a yielding connection between the shaft 29 and arm 28.

'lhe arms and connecting bars control the various valves, air intake, throttle and fuel valve, so that the throttle lever operates and controls all ot them andY their operations, their opening and closing movements, are in exact and predetermined relative ratios. They are arranged so that they can be adjusted with reference to the valve seats and with reference to-eaoh other,a 'lChus the needle valve has a screw head to receive a screw tightener 1whereby it can be adjust-ed and the position ot the arm l? thereon can be changed by slightly looseningl the end. ot the arm and then tightening it. 'llhe same thing is true ot' the arm 28 on the shalt or the air valve. 'there is further adjustment provided tor this air valve.

t lever 50 is secured on the shaft 29 Iand extends both upwardly and, downwardly therefrom so that means may be connected with either end to give it a slight oscillatory movement in the direction indicated by the arrovv in llig. 6., `llt is provided with an adjustable screw stop 5l. for engaging the arm 2S and limiting the return movement ot the latten ln cold weather or in any other emergency calling tor especially ditlicult vvork on the part of the carburetor in starting, alter the throttle lever '23 is actuated so as to partly open the throttle valve, the lever 50 is actuated in the direction of the arrow so as to at the saine time close the valve 30 and cause the carbureter to dravv heavily on the fuel supply for startinof purposes. .dritter the engine has started, then the lever 50 can be releasedV and thereafter the device operated as heretofore explained.

lhus it may be seen that the lever 28 may actuate the valve 30 only through the spring 12d, that is, by increasing or decreasing its tension, and since the spring is under tension at all times, there can be no loose movement ot the valve 3l). movement ot the lever 5U in the direction ot 'the arrovv, see Fig. 6, when the valves 22 and 30' are both open, Twill close the valve 30. This will increase the tension ot the spring l28, and When the lever 50 is released, the valve 30 will be opened by the action ol* the spring on the valve stein 29.,

noia-tea 'llhe throttle valve 22 has a small lll-shaped notch on one side, as shown in llig. 2, to unbalance it slightly and assist in starting the mixture on that side et the valve and thus allovv a longer passage oit the air over the tuel in the lower part ot the carburetor chamber.

We claim. as our invention:

chamber which is substantially llil-shape and has an air intake and a mixture outlet, an air intake valve, a throttle valve, a shaft on which each oit said valves is mounted and extending .outward beyond the oarbureting chamber, arms secured to each ot said valves,

l. A carburetor including a carburetin a bar connectingsaid arms, a fuel nozzle entering the lovver part ot the carbureting chamber, a valve extending through the top ot the carbureting chamber between the air intake and mixture outlet and projectin down to the nozzle, an arm on the upper en lot said valve, another arm on the shaft of the throttle valve, means for pivotally con m necting said tvvo last mentioned arms, and a throttle leveron the shaft of the throttle valve.

2. A carburetor including a carbureting chamber having; an air intake and mixture outlet, a fuel nozzle in the carbureting chamber between the air intake and mixture outlet, a throttle valve in the mixture outlet, a valve for controlling the air secured to a shalt extending through and outwardly beyond said carburetingl chamber, an arm loosely mounted on said shaft, a connection between said arm and the throttle valve 'whereby the two will be simultaneously operated, and a yielding connection between said arm and shaft. A

3. A carburetor including a earburetinr chamber having an air intake and mixture outlet, a :fuel nozzle in the carbureting chamn ber between the air intake and mixture out let, a throttle valve in the mixture outlet, a valve tor controlling the air intake, a con nection between said tivo valves whereby they vvill be simultaneously operated, and means tor temporarily closing said air in take valve alter the throttle has been operated.

l. A carbureter including a carbureting chamber having an air intake and mixture outlet, a fuel nozzle in the carbureting chamber between the air intake and mixture outlet, a throttle valve in the mixture outlet, a valve tor controllinl the air intake which is secured to a shaft extending through and outwardly beyond said carbureting chamber, an arm loosely mounted on said shaft, a connection between said arm and the throttle valve whereby the tvvo Will be simultaneously operated,- a yielding; connection between said arni and shalt, and a lever secured to said shalt tor actuating independently oit said or throttle valven intake Which is 5. A carbureter including a carbureting chamber having an air intake and mixture outlet, a fuel nozzle in the carbureting chamber, between the air intake and mixture outlet, a throttle valve in the mixture outlet, a valve for controlling the air intake which is secured to a shaft extending through and outwardly beyond said carbureting chamber, an arm loosely mounted on said shaft, a connection between said arm and the throttle valve whereby the two will be simultaneously operated, a yielding connection between said arm and shaft, and means for adjusting the relation between said lever and arm to predetermine the position of the air intake valve. A

In witness whereof, We have hereunto aiixed our signatures Inthe presence of the witnesses hereln named.

FRANCIS A. CHAPIN. WILLIAM Y. CHAPIN.

Witnesses to the signature ofFrancis A. Chapin:

O. M. MCLAUGHLIN, l H. J. WELLS. 

